2018 CC

2018 CC belongs to the Apollo asteroids, which cross the orbit of Earth. Apollo's are the largest group of near-Earth objects with nearly 10 thousand known members. It orbits the Sun at a distance of 0.84–1.73 AU once every 18 months (531 days; semi-major axis of 1.28 AU). Its orbit has an eccentricity of 0.35 and an inclination of 8° with respect to the ecliptic.^[2] With an aphelion of 1.73 AU, it is also a Mars-crosser, as it crosses the orbit of the Red Planet at 1.66 AU.

The body's observation arc begins with its first recorded observation by Pan-STARRS on 20 January 2018.^[1]

The object has a low minimum orbital intersection distance with Earth of 29,900 km (0.0002 AU), which corresponds to 0.078 lunar distances (LD). On 8 February 2034, it will approach Earth to a distance of 0.0212 AU (3,170,000 km; 1,970,000 mi) or 8.2 LD.^[2]

On 6 February 2018, it passed at a nominal distance of 0.0012640 AU (189,000 km; 117,000 mi) from Earth (0.49 LD). One hour earlier, it passed the Moon at 577,000 km (0.0038564 AU).^[2]

2018 flyby: Hourly motion across sky at flyby (left). View above Earth–Moon system of flyby with hourly motion (right).

The body's physical parameter remain largely unknown.^[2] Based on a generic magnitude-to-diameter conversion, and for an absolute magnitude of 26.541, the asteroid measures 15 and 40 meters in diameter, assuming a carbonaceous and stony albedo of 0.057 and 0.20, respectively.^[3] No rotational lightcurve has been obtained from photometric observations, and no rotation period, shape or pole has been determined.^[2]

As of 2018, this minor planet has not been numbered or named.^[1]